You can say that! But: if, rather than just writing a chin-stroking blog post, Easydns had actually hosted Gab's zones, I think they'd find the impact on their customer base would not be net positive.
Would it be negative? Why do I care whose DNS records are also hosted there?
However, I will be moving a handful of domains to Easy DNS because I appreciate them taking this position. I looked at Gab once a while back and was mostly disgusted, and never looked back, but I don't like this trend toward censoring and deplatforming. I don't worry about my speech being censored because (at least for now) it's relatively popular. But popular speech isn't the speech that needs protecting, the unpopular speech does.